1. Abortion is defined as termination of pregnancy resulting in expulsion of an immature, nonviable fetus. 妊娠终止导致未成熟的、无法成活的胎儿被排出体外称为流产。
2. Episodic expulsion is an important manner in the evolvement of source rocks, and hydrocarbon migration is in the manner of mixed phase. 幕式排油是烃源岩系统演化过程中的一种重要排油方式，此时烃类以混合相形式运移。
3. The effective reservoir of deep basin gas must have densified before the mass generation and expulsion of hydrocarbons from source rock, so do the "sweet points". 深盆气的有效储集层必须在烃源岩大量生、排烃之前就致密化，“甜点”也应在烃源岩大量生、排烃之前形成。
英英解释
n.
1. the act of forcing out someone or something
2. squeezing out by applying pressure
3. the act of expelling or projecting or ejecting
